Black Mountain (range)

The Black Mountain should not be confused with the Black Mountains in the east of the National Park, nor with a 703 metres (2,306 ft) summit in the Black Mountains that is confusingly also called Black Mountain. In his description of a Blak Montayne, the antiquarian John Leland refers to a massif extending between Carmarthen and Monmouth i.e. what is now considered to be the Brecon Beacons in the wider modern sense of that term, thus also including the Black Mountains and the intervening high ground of Fforest Fawr.[2] [3]

The term "Carmarthen Fans" (Bannau Sir Gâr in Welsh) is sometimes used inaccurately to describe the whole of this massif, whereas it should be restricted to the peaks along the northern escarpment within Carmarthenshire (the peak of Fan Brycheiniog lies east across the border into Brecknockshire). The "Carmarthen Fans" thus includes Fan Foel, Picws Du and Waun Lefrith. The highest point of the "Carmarthen Fans" and the county top of Carmarthenshire is thus the minor summit of Fan Foel, height 781 metres (2,562 ft).

The range stretches approximately from Ammanford in the south-west to Sennybridge in the north-east. The larger part of these hills is formed from Old Red Sandstone, though bands of Carboniferous Limestone and of Twrch Sandstone (or Millstone Grit) are important landscape-forming rocks in the south and west of the range owing to their greater resistance to erosion. The most resistant of all are the Plateau beds, which form a protective cap over most of the range. They also form steep cliffs just below the edge of the escarpment. The rocks are of the Devonian, in common with their companion peaks of the Brecon Beacons to the east. The area was glaciated during the ice ages and a number of fresh moraines are to be found beneath the spectacular north and east facing sandstone scarps in the north-east of the range, especially below Fan Hir. There are smaller moraines lying immediately below the cliffs of Waun Lefrith and Picws Du.

Llyn y Fan Fawr, below Fan Brycheiniog in the Black Mountain

The lakes below the escarpment of Llyn y Fan Fawr and Llyn y Fan Fach are also remnants of glacial action, having been created by other moraines blocking drainage by forming deep hollows below the cliffs.

There are many surviving remains, especially prehistoric and Roman, in the area. They include the castras at Mynydd Bach Trecastell and a Roman road crossing Fforest Fawr as Sarn Helen. There are numerous menhirs, round barrows and several small stone circles. An especially famous circle occurs on the banks of the River Tawe below Fan Hir, and is known as Cerrig Duon, or "black stones". There is a standing stone outside the circle nearby, known as Maen Mawr, with two smaller stones forming a small avenue. There is also evidence of human settlements, hut circles and agriculture. Recent excavation of a cairn or round barrow on Fan Foel showed it to be of early Bronze Age in date (circa 2000 BC) and there is a very similar unexcavated round barrow on Picws Du. The excavation at Fan Foel indicated that the moorland was well-wooded in Bronze Age Britain owing to a warmer climate than at present, with much of the present moorland covered by hazel scrub with oak at lower heights. Most current moorland elsewhere in Britain was in a similar condition, and extensive Bronze Age remains have been found there too. Examples include Dartmoor, Exmoor, Bodmin Moor, much of the upland Pennines and upland Welsh moorland in the centre and north of the country. All such moorlands are tree-less in their upper parts, in their current sub-arctic state.

Llyn y Fan Fach lake below the escarpment and Picws Du

The Black Mountain range seen from the Usk Reservoir

The massif is drained by a number of rivers which flow down the southern dip-slopes of the massif from its main ridge. In contrast the northerly directed streams tend to be shorter and steeper. The upper parts of the range are largely moorland and covered with peat bog, some of which is degrading judging by the partly destroyed sections of peat bank near Llyn y Fan Fawr. The rivers Usk and Tawe have their sources on the northern and eastern flanks of the range whilst the smaller Loughor arises at the western end of the range. Significant right bank tributaries of the Tawe such as the River Giedd and the Afon Twrch, as well as the River Amman, a tributary of the Loughor, are the principal southerly-directed watercourses. Two left-bank tributaries of the River Towy, the River Cennen and the Afon Sawdde, drain the northwestern slopes of the Black Mountain.[4]

The range is noted for its two large glacial lakes which sit directly below the main escarpment, being much larger than the small lake of similar origin which occurs below Pen y Fan.

Parts of the massif are over 5 km or over 3 miles from the nearest public road. Indeed, those roads are mostly very minor single track roads with a few passing places, making the centre of the range even more inaccessible. There are several small car parks on the minor roads crossing the range, and a larger car park on the minor road from Llanddeusant village to the base of the access road to Llyn y Fan Fach. Virtually the entire massif consists of land mapped as open country and hence legally accessible to the public on foot under the provisions of the Countryside and Rights of Way Act 2000. In addition the range is crossed from north to south by a number of long bridleways which may be used by mountain bikers and horseriders though long sections of them are very rough and indistinct. The Beacons Way traverses the range roughly from east to west. Increased use of certain sections of path by walkers in recent years has resulted in accelerated erosion, a problem exacerbated by the sometimes thin, gravelly soils and the high rainfall, and has prompted repairs by the Brecon Beacons National Park Authority. There are numerous peat bogs on the high and middle ground, although some are bridged by stone pavements. There is a well graded stone staircase which carries the Beacons Way path from Llyn y Fan Fawr up the escarpment to Fan Brycheiniog in the centre of the range.

Side view of adult red kite, Wales

There are numerous different species of bird in the area, and they include the red kite, common buzzard, kestrel, carrion crow, common raven and skylark to name a few of the most obvious residents. The red kite was previously restricted to this and adjoining areas in South Wales such as Mynydd Mallaen owing to persecution by gamekeepers in the rest of the country, but has since been introduced widely in southern Britain, such as the Chilterns. The kestrel and buzzard are widely distributed, but the raven is restricted to the higher mountains. There is a wide distribution of mammals such as field voles, red foxes and badgers as well as many songbirds. The skylark is plentiful due to the extensive rough pasture present below the main peaks which allows ground nesting of the species. Pied wagtails are common near the streams and torrents running from the hill tops.

The Black Mountain is generally considered to be one of the wildest regions of Wales and is associated with numerous myths such as the Arthurian legend of the Lady of the Lake and Twrch Trwyth. More recent events are commemorated in prose and verse, e.g. 'From the Mist to Heaven' written after a tragedy played out on these moors in May 1904.[7] Cribarth on its southeastern margin is sometimes known locally as the Sleeping Giant, after the appearance of its profile from Cwm Tawe to the south.

• Black Mountains
• Brecon Beacons
• South Wales

51.88144°N 3.70848°W / 51.88144; -3.70848